#include "stm32f10x_conf.h"
#include <stdio.h>

void printf_init(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef	USART_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
	
	/* TX - PA.9 */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	/* RX - PA.10 */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	USART_InitStructure.USART_BaudRate = 115200;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl	= USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Tx|USART_Mode_Rx;
	
	USART_Init(USART1, &USART_InitStructure);
	USART_Cmd(USART1, ENABLE);
}

int fputc(int ch,FILE *f)
{
	USART_SendData(USART1, (unsigned char)ch);
	while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
	return ch;
}
